'Theirs' in the Bible

"The house of Israel and Judah is guilty and theirs is a stubborn guilt, at that!" he replied to me. "The land is filled with blood, and the city overflows with injustice, because they keep saying, "The LORD has abandoned the land,' and "The LORD isn't watching.'

So now, bear your own shame as you mediate for your sisters. The sins that you've committed are more detestable than theirs. That makes them more righteous than you. Indeed, be ashamed and bear your reproach, because you've made your sisters to be more righteous than you."